Cherubim and sanobim are the faithful and efficient aids of the seraphic ministers.  Celestial artisans teach efficient energy intake to cherubim and sanobim.  Chief of cherubim and sanobim took part in the council of Melchizedek receivers after rebellion.  They are directed by seraphim, of whom they are the faithful and efficient aids.  Cherubim and sanobim are continuously engaged in efforts at self-improvement. By study in the schools of the planets they acquire additional tongues. 
Cherubim and sanobim are by nature very near the morontia level of existence, and they prove to be most efficient in the borderland work of the physical, morontial, and spiritual domains.  They are the lowest order of angels, hence all the nearer of kin to the more progressive types of human beings on the evolutionary worlds.  Cherubim and sanobim may attain a full seraphic standing.  They appear in personality registers. 
They are always associated with seraphim; keep records sponsored by seraphim. A pair of seraphim is assited by a pair of one cherubim and one sanobim.  They are in charge of delivering undeveloped souls of untimely dead childs to probationary nurseries, where they have educational facilities.  They help Spirit-fused survivors repossess mortal memory.  They do not help guardian angels on mansion worlds when their pupils attain the morontial life. 
Also perform many indispensable borderline tasks on the morontia training worlds and are assigned to the service of the Morontia Companions in large numbers.  The cherubim and sanobim are the routine spirit workers on the individual worlds of the systems.  Each type of angel is very limited in solitary function; hence they usually serve in pairs. 
Many were lost in Lucifer rebellion. One third of all the Jerusem cherubim attached to the administrator angels were lost with their disloyal seraphim. On Urantia there was a terrible loss of personalities among seraphim and cherubim.  There were some rebel cherubim and sanobim on earth up to Christ’s death. 
Cherubim and sanobim are “fourth creatures” as Havona Servitals and conciliating commissions. Every fourth cherubim and every fourth sanobim are quasi-material, very definitely resembling the morontia level of existence.  They do not have a difference in sex but cherubim have a difference called positive or aggressive and negative or retiring. 
See also: UB 38:7-8.